Sponsor Message:
Military Aviation & Space Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
New Potus Helicopter Makes First Flight  
User currently offlineVenus6971 From United States of America, joined Dec 2004, 1440 posts, RR: 0
Posted (7 years 3 weeks 4 days 8 hours ago) and read 7105 times:

http://www.defensetech.org/archives/003584.html?wh=wh

I thought this would be intereseting for you anet'rs.


I would help you but it is not in the contract
34 replies: All unread, showing first 25:
 
User currently offlineDL021 From United States of America, joined May 2004, 11446 posts, RR: 76
Reply 1, posted (7 years 3 weeks 4 days 8 hours ago) and read 7091 times:
Support Airliners.net - become a First Class Member!

Very much so. I'm very glad that we chose such an excellent helicopter for this mission. I think it's the largest helo that can be conveniently carried by the C-5 and C-17, and it's the most modern three engined helo available. I like the extra security of the third engine when it comes to carrying our CINC.

I further have no real issue with the idea of buying some equipment from our allies....especially when a serious chunk of the work is being done here. It seems to be the best equipment for the job.....just like the EH-145/UH-72.



Is my Pan Am ticket to the moon still good?
User currently offlineDeltaGuy From , joined Dec 1969, posts, RR:
Reply 2, posted (7 years 3 weeks 4 days 8 hours ago) and read 7083 times:

I'm not a helo nut by any stretch, but I thought NOTARS was the big trend nowadays? Or is that impractical on a helo that size?

DeltaGuy (wouldn't know how to fly a helo if his life depended on it)


User currently offlineChecksixx From United States of America, joined Mar 2005, 1079 posts, RR: 0
Reply 3, posted (7 years 3 weeks 4 days 8 hours ago) and read 7084 times:

Quoting DL021 (Reply 1):
especially when a serious chunk of the work is being done here.

Its being built completely in the United States.


User currently offlineN328KF From United States of America, joined May 2004, 6483 posts, RR: 3
Reply 4, posted (7 years 3 weeks 4 days 8 hours ago) and read 7082 times:

Quoting Checksixx (Reply 3):
Its being built completely in the United States.

You mean it's being assembled in the United States from Anglo-Italian CKD kits.



When they call the roll in the Senate, the Senators do not know whether to answer 'Present' or 'Not guilty.' T.Roosevelt
User currently offlineUH60FtRucker From , joined Dec 1969, posts, RR:
Reply 5, posted (7 years 3 weeks 4 days 6 hours ago) and read 7034 times:

Quoting DeltaGuy (Reply 2):
I'm not a helo nut by any stretch, but I thought NOTARS was the big trend nowadays? Or is that impractical on a helo that size?

Not really. It's an impressive technology, but only a few helicopters utilize it... and none of them very large helicopters.

A year ago when the Army was deciding which helicopter they wanted to fill the new LUH slot, one of the top runners was the MD Explorer... but the EH-145 won at the end of the day.

The NOTAR system offers some nice advantages - less noise (I was standing outside on the airfield with a MD500 hovering at 100ft over my head... and I was amazed at how quiet it was.) It also reduces the vibrations. Anyone who has flown in a helicopter -especially on a daily basis will tell you two things will wear your body down more than anything else: the noise of a helicopter, and the vibrations of a helicopter!

The conventional tail rotor is actually responsible for a vast amount of the noise a helicopter produces. Whereas it is linked to the main rotor system via a driveshaft... the tail rotor must spin much faster than the main rotors, thus producing more sound. Interestingly, in the UH-60 our tail rotor is mounted at a 20degree angle, which produces 2.5% of the total lift of the helicopter.

Anyway, the NOTAR system is also heavier, due to the large fan which forces low pressure air down the tail and out the "exhaust vents". It's also ineffective at high speeds, so conventional control surfaces help maintain forward stability during flight. And it's also less maneuverable as speed increases.

Like everything else - it's a trade off.

Quoting DeltaGuy (Reply 2):
DeltaGuy (wouldn't know how to fly a helo if his life depended on it)

lol... well I don't want to talk myself up... but a monkey can fly an airplane. It takes a PILOT to fly a helicopter!  Wink

-------------------

Anyway, this is going to make a fantastic Marine One. Say, do they let Army helicopter pilots fly these birds? Or do you have to be a marine aviator?

-UH60


User currently offlineDL021 From United States of America, joined May 2004, 11446 posts, RR: 76
Reply 6, posted (7 years 3 weeks 4 days 6 hours ago) and read 7025 times:
Support Airliners.net - become a First Class Member!

Quoting UH60FtRucker (Reply 5):
Say, do they let Army helicopter pilots fly these birds? Or do you have to be a marine aviator?

Unfortunately, in order to fly the President in a helo, there seems to be some arcane rule about your parent's not being allowed to know each other.....  duck   Wink



Is my Pan Am ticket to the moon still good?
User currently offlineLegs From Australia, joined Jun 2006, 235 posts, RR: 0
Reply 7, posted (7 years 3 weeks 3 days 19 hours ago) and read 6888 times:

How does a shrouded tail rotor compare to the other two types mentioned?


View Large View Medium
Click here for bigger photo!

Photo © David Moore



User currently offlineDavid L From United Kingdom, joined May 1999, 9523 posts, RR: 42
Reply 8, posted (7 years 3 weeks 3 days 14 hours ago) and read 6838 times:

Quoting UH60FtRucker (Reply 5):
lol... well I don't want to talk myself up... but a monkey can fly an airplane. It takes a PILOT to fly a helicopter!

Easier than I thought, then. I thought a helicopter pilot had to resemble an octopus with a chameleon's eyes.  Smile


User currently offlineBladeLWS From United States of America, joined Dec 2005, 403 posts, RR: 0
Reply 9, posted (7 years 3 weeks 3 days 13 hours ago) and read 6812 times:

Quoting Legs (Reply 7):
How does a shrouded tail rotor compare to the other two types mentioned?

A shrouded rotor reduces noise alot for urban areas, but it's draw back is that it adds weight and needs a stronger boom to support it.


User currently offlineChecksixx From United States of America, joined Mar 2005, 1079 posts, RR: 0
Reply 10, posted (7 years 3 weeks 3 days 10 hours ago) and read 6763 times:

Quoting N328KF (Reply 4):
You mean it's being assembled in the United States from Anglo-Italian CKD kits.

Not at all...I meant built which means assembled smarty pants.


User currently offlineChecksixx From United States of America, joined Mar 2005, 1079 posts, RR: 0
Reply 11, posted (7 years 3 weeks 3 days 9 hours ago) and read 6762 times:

Quoting UH60FtRucker (Reply 5):
I was standing outside on the airfield with a MD500 hovering at 100ft over my head... and I was amazed at how quiet it was.

I understand what you meant, but for those who don't know, there are no MD500's with NOTAR...And yes, as UH60FtRucker stated, they are considerably more quiet.


User currently offlineChecksixx From United States of America, joined Mar 2005, 1079 posts, RR: 0
Reply 12, posted (7 years 3 weeks 3 days 9 hours ago) and read 6758 times:

Quoting BladeLWS (Reply 9):
A shrouded rotor reduces noise alot for urban areas, but it's draw back is that it adds weight and needs a stronger boom to support it.

Actually as Eurocopter found out, the fenestron tail rotor system was MUCH louder. This is the main reason that they recently redesigned it with off-set blades in order to reduce the noise.


User currently offlineUH60FtRucker From , joined Dec 1969, posts, RR:
Reply 13, posted (7 years 3 weeks 3 days 8 hours ago) and read 6717 times:

Quoting David L (Reply 8):
Easier than I thought, then. I thought a helicopter pilot had to resemble an octopus with a chameleon's eyes.

lol... sometimes I wish I had as many arms as an octopus. Helicopters just simply require constant piloting and control.

Quoting Checksixx (Reply 11):

I understand what you meant, but for those who don't know, there are no MD500's with NOTAR...And yes, as UH60FtRucker stated, they are considerably more quiet.

You're right, it was the MDExplorer. Must have been a brain-fart.

Quoting BladeLWS (Reply 9):
A shrouded rotor reduces noise alot for urban areas, but it's draw back is that it adds weight and needs a stronger boom to support it.



Quoting Checksixx (Reply 12):
Actually as Eurocopter found out, the fenestron tail rotor system was MUCH louder. This is the main reason that they recently redesigned it with off-set blades in order to reduce the noise.

That's interesting, I wonder why that was? Was it just this particular helicopter? Because I know that in the case of the RAH-66, the tail rotor noise was lowered substantially by enclosing it in a shroud.

The shroud will typically direct the noise to the sides of the helicopter... and not down. Therefore, those standing below a helicopter will not hear as much noise. Also the shroud will help minimize the tail rotor vortices interacting with the main rotor vortices, creating less vibration, and thus more comfort for the passengers and crew. The shroud also minimizes the chance of you sticking your tail rotor into something - which surprisingly happens more often then some might think! Like I said - tail rotors cause a disproportionate amount of noise for their size - due to their faster rotation. And that noise is higher pitched, and very loud to the human ear. I HATE standing outside a UH-60 when the throttle is full forward - that tail rotor hurts the ears.

The problem is like BladeLWS said - it's heavy. However, the shroud offers BETTER aerodynamic performance by reducing certain vortex creations and interactions.

-UH60


User currently offlineA342 From Germany, joined Jul 2005, 4680 posts, RR: 3
Reply 14, posted (7 years 3 weeks 3 days 6 hours ago) and read 6689 times:

To get back to the article (FI also has one),

is the need for a new presidential helo so pressing that they can't wait to get the definitive (Increment 2) aircraft?



Exceptions confirm the rule.
User currently offlineHeliflyerPDC From Belgium, joined Sep 2006, 128 posts, RR: 0
Reply 15, posted (7 years 3 weeks 3 days 5 hours ago) and read 6671 times:

Big version: Width: 3300 Height: 2332 File size: 1169kb
vh71


looks nice doen't it

grtz PDC



grtz PDC
User currently offlineUH60FtRucker From , joined Dec 1969, posts, RR:
Reply 16, posted (7 years 3 weeks 3 days 5 hours ago) and read 6662 times:

Quoting A342 (Reply 14):
To get back to the article (FI also has one),

is the need for a new presidential helo so pressing that they can't wait to get the definitive (Increment 2) aircraft?

As explained:

Quote:
"The focus for Increment 1 is to deliver maximum capability within an aggressive schedule," notes Dewar. "While we test the aircraft and gear up for production, concurrent engineering will allow a seamless transition to Increment 2. We will deliver a mission-ready aircraft four years after contract award. The fully mission capable aircraft will be delivered two years after that."

TV-1 through TV-5 will be Increment 1 aircraft, and will be used to test the technology and additional features that will be found on the VH-71.

TV-6 will be the first Increment 2 aircraft, and will be used for aircraft performance evaluations, for which performance charts for the VH-71 will be based off of.

The eighteen Increment 2 production aircraft will come off a second assembly line in Amarillo, Texas. Full Yankee White security protocols will be in effect at this factory.

-UH60


User currently offlineDL021 From United States of America, joined May 2004, 11446 posts, RR: 76
Reply 17, posted (7 years 3 weeks 3 days 5 hours ago) and read 6661 times:
Support Airliners.net - become a First Class Member!

Quoting Checksixx (Reply 10):
Not at all...I meant built which means assembled smarty pants.

Well....to be fair many people may be of the opinion that "built" means parts forged and built here as well as assembled into a large constellation of parts that will all move in the same direction at the same speed....if we're all very lucky!

The aircraft assembly issue is one that is touchy....are the AV-8B's built here or assembled here? The engines and parts kits came from elsewhere, so I guess it's opinion or interpretation.



Is my Pan Am ticket to the moon still good?
User currently offlineAutoThrust From Switzerland, joined Jun 2006, 1591 posts, RR: 9
Reply 18, posted (7 years 3 weeks 3 days 4 hours ago) and read 6635 times:

I wonder why they didnt choose the much more modern NH-90, was it to small? To less range?

Quote:

NH-90
# Length: 16.13 m (52 ft 11 in)
# Rotor diameter: 16.30 m (53 ft 5¾ in)
# Height: 5.23 m (17 ft 2 in)
# Empty weight: 5,400 kg (11,900 lb)
# Max takeoff weight: 10,600 kg (23,370 lb)
# Range: 800 km (TTH); 1,000 km


EH-101
# Length: 74 ft 10 in (22.81 m)
# Rotor diameter: 61 ft 0 in (18.59 m)
# Height: 21 ft 10 in (6.65 m)
# Empty weight: 23,150 lb (10,500 kg)
# Useful load: 12,000 lb (5,443 kg)
# Max takeoff weight: 32,188 lb (14,600 kg)
# Range: 750 nm (863 mi, 1389 km)



“Faliure is not an option.”
User currently offlineDL021 From United States of America, joined May 2004, 11446 posts, RR: 76
Reply 19, posted (7 years 3 weeks 2 days 23 hours ago) and read 6570 times:
Support Airliners.net - become a First Class Member!

Quoting AutoThrust (Reply 18):
I wonder why they didnt choose the much more modern NH-90, was it to small? To less range?

Well....the NH90 is not really "much more modern". It has half the payload capacity, one less engine, alot less room, and would not have beaten the Sikorsky S-92 offering, much less the superior capability Merlin-type.


Size definitely played a role, on top of the power and other issues.



Is my Pan Am ticket to the moon still good?
User currently offlineCancidas From Poland, joined Jul 2003, 4112 posts, RR: 11
Reply 20, posted (7 years 3 weeks 2 days 22 hours ago) and read 6557 times:

Quoting UH60FtRucker (Reply 5):
well I don't want to talk myself up... but a monkey can fly an airplane. It takes a PILOT to fly a helicopter!

very well said!



"...cannot the kingdom of salvation take me home."
User currently offlineA342 From Germany, joined Jul 2005, 4680 posts, RR: 3
Reply 21, posted (7 years 3 weeks 2 days 17 hours ago) and read 6528 times:

Quoting UH60FtRucker (Reply 16):
As explained:

Ok, I should refer to the FI article:

Quoting FI:
AgustaWestland has flown the first test aircraft built specifically for the Lockheed Martin VH-71 US presidential helicopter programme. (...)


Under Increment 1 of the programme, three additional test aircraft will fly by early 2008 and five pilot-production VH-71s will be delivered by October 2009 to meet the urgent requirement for a new presidential helicopter.

An improved version of the helicopter with increased performance will be developed for Increment 2. This will have uprated engines, a new transmission, longer rotor blades and extended tailboom to give the helicopter longer range and a command and control capability while in flight.

Original plans called for 18 new Increment 2 helicopters, plus upgrades to the Increment 1 machines, but because of the extensive changes the VH-71 team has recommended production of 23 new Increment 2 helicopters.(...)


VH-71 prime contractor Lockheed Martin is already using an EH101, designated TV-1, for initial testing in the USA, including landings on the White House lawn.

http://www.flightglobal.com/articles...presidential-helicopter-flies.html



Exceptions confirm the rule.
User currently offlineAutoThrust From Switzerland, joined Jun 2006, 1591 posts, RR: 9
Reply 22, posted (7 years 3 weeks 2 days 14 hours ago) and read 6503 times:

Quoting DL021 (Reply 19):
Well....the NH90 is not really "much more modern"

Sorry thats not true, the NH-90 is much more modern; it has a fully 4x redundant digital fly by wire which the helicopter can fly automatic and hover without manual input. The Fuselage is mainly CFRP with Fibre Reinforced Plastic which provides much less corrosion with low Radar signature.
Besides it has several computers for Navigation,Communication,Monitoring,Surveillance,Diagnosis,etc..
Avionics system based on a dual MIL-STD-1553B digital databus. Further upgrades will provide the NH-90 with care free handling features. I couldnt find much more information.

The EH-101 has a electromechanical BAE systems flyby wire and a modular aluminium-lithium alloy fuselage.The EH101 is equipped with helicopter management, avionics and mission systems linked by two 1553B multiplex databuses.

Quoting DL021 (Reply 19):
Size definitely played a role, on top of the power and other issues.

Agreed, the EH-101 is sure a great helicopter and will server well as presidential chopper.



“Faliure is not an option.”
User currently offlineDL021 From United States of America, joined May 2004, 11446 posts, RR: 76
Reply 23, posted (7 years 3 weeks 2 days 9 hours ago) and read 6430 times:
Support Airliners.net - become a First Class Member!

AUto...well...ok...it looks to me like they're both served by the same computers and safety systems...but you are correct in that the carbonfibre body on the NH is more advanced than the al-li loy on the Merlin...

I'd have to say though that they are the same generation of airplane and relatively equal in their electronics and engine tech.

But we do agree that the VH-71 will serve the mission very well.



Is my Pan Am ticket to the moon still good?
User currently offline777 From Italy, joined Sep 2005, 514 posts, RR: 0
Reply 24, posted (7 years 3 weeks 1 day 12 hours ago) and read 6277 times:

Here below some pictures of the event (from www.thedigitalaviator.com)


http://www.thedigitalaviator.com/blog//wp-content/uploads/VH001.jpg

http://www.thedigitalaviator.com/blog//wp-content/uploads/VH002.jpg

http://www.thedigitalaviator.com/blog//wp-content/uploads/VH003.jpg

http://www.thedigitalaviator.com/blog//wp-content/uploads/VH004.jpg


25 Post contains links Fumanchewd : NOTAR technology is patented by MD and not currently used by any other company. What's more, only helicopters from MD Helicopters feature the patente
26 Revelation : I still wonder why we need 18 helicopters for 1 president... Seeing them fly in formation would look like the helicopter invasion scene from "Apocylp
27 Tugger : Make you a bet they would let THIS helicopter use it if asked (In fact I believe the US government could force its use if so desired). I wonder if it
28 Curt22 : POTUS has a big "posse"! Prez travel required several acft (hauling limo's, comm, secuirty force etc) and multipul helicopters that travel with him..
29 StealthZ : Am I missing something here? If you add the useful load to the empty weight you get something like 1,300kg over the max take off weight. Just curious
30 HanginOut : Will the US-101 also replace the UH-60 that POTUS uses on trips outside of the US? Also, please correct me if I'm wrong but isn't the air transport re
31 AutoThrust : Oh! Of yourse you are right, didnt check it. I shouldnt have done it but this data are from Wikipedia. I couldnt find a lot infos about the NH-90 tha
32 DL021 : The VH-60s are flown by USMC pilots if I'm not mistaken. They're the only H-60's in the USMC inventory.
33 Echster : I think it is a buy of 23 total airframes. To answer your question, though, these are more than for the President. They're also for the Vice Presiden
34 HanginOut : I looked into this further and you (and Echster) are right. The VH-60s for POTUS, the VP and visiting heads of state are operated by the USMC. The Ar
Top Of Page
Forum Index

Reply To This Topic New Potus Helicopter Makes First Flight
Username:
No username? Sign up now!
Password: 


Forgot Password? Be reminded.
Remember me on this computer (uses cookies)
  • Military aviation related posts only!
  • Not military related? Use the other forums
  • No adverts of any kind. This includes web pages.
  • No hostile language or criticizing of others.
  • Do not post copyright protected material.
  • Use relevant and describing topics.
  • Check if your post already been discussed.
  • Check your spelling!
  • DETAILED RULES
Add Images Add SmiliesPosting Help

Please check your spelling (press "Check Spelling" above)


Similar topics:More similar topics...
F-35 First Flight Imminent posted Wed Dec 6 2006 17:34:49 by RichardPrice
First Flight Of U.S.C.G. HC-235A posted Fri Nov 10 2006 04:55:27 by FlyUSCG
Alenia's Sky-X Ucav Achieves First Flight posted Sat Jun 4 2005 12:50:05 by Bsergonomics
Nimrod MRA4 First Flight? posted Mon Aug 2 2004 21:26:52 by Saintsman
New Hardware Since The First Gulf War posted Wed Jan 29 2003 13:34:30 by Soren-a
Bird Of Prey In Museum 6 Yrs After First Flight posted Wed Nov 6 2002 13:46:42 by Keesje
New C-5M Glass Cockpit First Pics. posted Tue Oct 15 2002 23:31:58 by Galaxy5
Rmaf Orders New Aircraft/helicopter posted Sat Mar 16 2002 05:00:34 by Triple Seven
New Boeing CH-47F Helicopter Takes Flight posted Thu Oct 26 2006 09:53:54 by Columba
First C5 Galaxy Arrives At It's New West Va. Home posted Mon Dec 11 2006 22:55:22 by Mainrunway

Sponsor Message:
Printer friendly format